DCS Region IDs, Locations, and Host Names

The regional DCS server host name is required to make calls to the
DCS. This is because the DCS stores information in data centers that are
geographically close to site visitors. Your queries will work if you send them
to the wrong DCS, but these calls are inefficient and can delay the response.
To make a DCS request, match the region ID to its corresponding regional host
name and form your query with the proper host name.